A user reports an error message on an Explore: “Non-unique value/primary key (or sql_distinct_key), value overflow or collision when computing sum”.
What should the LookML developer check for in the joined views of the Explore?
A. The sum measure used is defined correctly.
B. A unique primary key is defined in each view.
C. Symmetric_aggregates: no is not present in the Explore definition.
D. No concatenated primary keys are used.
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